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  1. bertus

    Computer speakers power issue

    Hello, There are sevaral types of alcohol. IPA is also known as rubbing alcohol: https://en.wikipedia.org/wiki/Alcohol I most times use Ethanol when I need to clean something. Bertus
  2. bertus

    Computer speakers power issue

    Hello, I have taken three pictures from the openings post and rescaled them. This looks like a deposit of the corrosion of the PCB. Not much to see on this picture. Massive corrosion around the diodes. Bertus
  3. bertus

    Buzzing Makita DC1414 F charger

    Hello, The mains capacitor could cause hum. The output capacitor could cause screeming (high frequency noise), when the ESR is going up. Bertus
  4. bertus

    Variable and alternating flashing LED...

    Hello, Do you mean something like this on AAC: https://forum.allaboutcircuits.com/threads/police-lightbar.93253/ Bertus
  5. bertus

    Buzzing Makita DC1414 F charger

    Hello, @Harald Kapp @Martaine2005 , I see that the free software Audacity is used to show the spectrum of the sound: https://www.audacityteam.org/ It is a rather strong package with a lot of capabilities. Bertus
  6. bertus

    (Old) software at the Internet Archive

    Hello, In the menu on the left, you can select the year of the software. There are also other selection menus on the left side. Bertus
  7. bertus

    Comedy Thread

    Found at AAC:
  8. bertus

    Power supply high voltage

    Hello, As Halrald said, try a resistor (or a small lightbulb from 4.5 or 6 volts torch) as load and see if the voltage goes down. Bertus
  9. bertus

    Power supply high voltage

    Hello, @Harald Kapp , The power supply is rated for 400 mA. The given 20 mA is for the 220 Volts side. Bertus
  10. bertus

    Power supply high voltage

    Hello, How can you tell it is regulated? It is not noticed on the power supply. Bertus
  11. bertus

    Power supply high voltage

    Hello, Could it be that the powersupply is unregulated? If so, the voltage should go down under load. Bertus
  12. bertus

    Fuse size Question

    Hello, Have a look at the following PDF sections from littelfuse. Bertus
  13. bertus

    (Old) software at the Internet Archive

    Hello, Here I found a collection of old software on the Internet Archive: https://archive.org/details/software Bertus
  14. bertus

    (Old) software at the Internet Archive

    bertus submitted a new resource: Old software at the Internet Archive - Old software at the Internet Archive Read more about this resource...
  15. bertus

    5v - 2A power supply causing damage

    Hello, It looks there can be 5 connections on a micro USB connector: https://pinouts.ru/PortableDevices/micro_usb_pinout.shtml Are you sure you used the correct connections? Bertus
  16. bertus

    5v - 2A power supply causing damage

    Hello, Did you try to reset the JBL? Turn the JBL GO on Press and hold the Volume + and the Bluetooth button simultaneously for 3 seconds The JBL GO will turn off and has now been reset. Bertus
  17. bertus

    5v - 2A power supply causing damage

    Hello, JBL Go gives a lot of models: https://www.google.com/search?as_st=y&tbm=isch&as_q=+JBL+Go&as_epq=&as_oq=&as_eq=&imgsz=&imgar=&imgc=&imgcolor=&imgtype=&cr=&as_sitesearch=&safe=images&as_filetype=&tbs= There are also many models of the Trust power bank...
  18. bertus

    5v - 2A power supply causing damage

    Hello, Did you connect the powersupply on the input (charge port) of the powerbanks? You can NOT connect it to the outputs. Bertus
  19. bertus

    Comedy Thread

    Foud at AAC: Christmas is all about perspective:
  20. bertus

    Circuit does not simulate

    Hello, Your schematic is hard to read with all those crossing lines. I have added straight lines in red, as I can not edit the circuit (it looks like proteus): Bertus
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